Sharpening attachment for multiple rotary band cutters



Jan. 9, 1951 P; cRlssEY SHARPENING ATTACHMENT FOR MULTIPLE ROTARY BANDCUTTERS Filed May 17, 1949 will 111111111 IN V EN TOR.

Patented Jan. 9, 1951 UNITED STATESv BATENT; OFFICE SHARPENINGATTACHMENT FGR MULTIPLE ROTARY BAND CUTTERS Paul Cr'issey, Geneva, Ill.

Application May 17, 1949, Serial No. 93,692

4 Claims. (01. 51--250) This invention relates to an attachment formachines in which multiple rotary band cutters or knives operate inconjunction with an article to be severed into a plurality of piecesthereby, such as a bread slicing machine, and more particularly anattachment for sharpening the cutters featuring a series of sharpeningstones fixed in spaced parallel relation along the path of the cuttersby means of a holder mounted on a stationary mount for swinging movementabout said mount as an axis toward and away from a position ofengagement with a selected plurality of said cutters and for movement inselected planes angularly of said axis of swinging movement.

The general object of this invention is to pro vide a sharpening devicefor cutters or knives of a machine of this type through which the bladesmay be touched up or sharpened without necessitating removal of theblades from an operative position on the machine, thus making itconvenient to service and maintain the cutters, as required, withoutinterrupting the operation of the machine.

Another object of the invention is to provide a device of this characterwhich is very simple in construction and easy to operate.

With these and other objects not specifically mentioned in view, theinvention consists in certain constructions and combinations hereinafterfully described and then specifically set forth in the claims appendedhereto.

In the drawings:

Fig. l is a side elevational view of a bread slicing unit of typicaldesign and construction illustrating a machine of the character withwhich the invention is adapted to cooperate.

Fig. 2 is an enlarged bottom plan view taken on a plane indicated byarrows 22 of Fig. 1 with the sharpening stones in operative position.

Fig. 3 is a fragmentary view like Fig. 2 but showing the sharpener ininoperative position.

Fig. 4 is an end view in the direction of the arrows 44 on Fig. 2.

In the above mentioned drawings, only one embodiment of the inventionhas been shown, which is deemed preferable, but it is to be understoodthat changes and modifications may be made within the scope of theappended claims without departing from the spirit of the invention.

In said drawings, the attachment forming the subject of this invention,is shown in connection with a typical bread slicing machine including aframe In on which a pair of cylindrical pulleys or rotors II and I? aresupported in vertically spaced and aligned relation, which pulleys aredriven by a motor l3. A series of cutters or knives in the form ofcrenated hands it, preferably crossed in figure 8 form as shown in Fig.l, are trained about said pulleys for movement therewith in pathsselected in accordance with the spacing between slices :of the breadleaf to be operatedupon. In a machine .as shown in Fig. 1, the materialto be cut by said knives or blades travels from left to right of themachine as .shown in said Fig. 1 and the cutting edges of said bands 14are accordingly presented toward the left of Fig. 1 corresponding to thedirection from which the material approaches said blades.

The sharpening attachment contemplated by this invention consists of acylindrical shaft [5 suitably fastened as at IE to the upright frame ISwith its longitudinal axis parallel to the axes of said pulleys II andI2 and spaced rearwardly of the unsharpened edges of the bands 14 wheresaid bands present their fiat sides in parallel planes at right anglesto the axes of the pulleys ii and 2. The shaft l5 supports a sleeve llhaving loose telescoping fit thereover whereby said sleeve is movableaxially of the shaft and also angularly about the shaft 15 as an axis.The sleeve I! is equipped with a longitudinal wing member I 8 inradially offset relation to the sleeve, said wing member being providedwith a series of openings extending axially parallel to the flat sidesof the bands It. These openings provide sockets in which a series ofstems or shanks [9 are individually adjustably mounted by means of lockscrews 2| whereby a sharpening stone 2!) carried at the outer end ofeach of said stems together form a row of sharpening stones in spacedparallel relation to the sleeve I! and in spaced apart relationlengthwise of the sleeve in selected symmetry with the spacing betweenthe bands M of the machine. As shown in Fig. 2 the stones 20 are ofbulbular design although various other suitable shapes may besubstituted therefor, provided the stone is of a transverse dimensionhaving clearance between neighboring bands l4.

Thus by turning the sleeve ll to an angular position wherein saidsharpener stones 20 occupy a position between selected bands M thesleeve I! may be moved lengthwise of the shaft I 5 to cause the stones20 to engage corresponding sides of to engage other corresponding sidesof the bands I 4 adjacent thereto. To facilitate manipulation of thesleeve H, the end thereof remote from the fastened end is equipped witha handle 22.

The end of the sleeve I! at the fastened end of the shaft [5 is providedwith a notch havine a portion 23 extending longitudinally inwardly fromthe edge of the sleeve and a branch portion 24 extending transverselyand forming a continuation thereof which is adapted to be moved intointerlocking engagement with a pin or stud 25 secured to the shaft l5 byrotation of the sleeve to a position wherein said sharpener stones 20are moved into an inoperative position at approximately 90 degrees angleaway from their operative position when intermediate of said bands Hi.

What is claimed is:

1. An attachment for machines having series of band blades travellingcontinuously about spaced parallel rotors comprising in combination astationary shaft supported in spaced parallel relation to the axes ofsaid rotors, a sleeve mounted thereon for swinging motion andlongitudinal shifting motion relative to said'shaft, and abrasive headedstems fastened to said sleeve in aligned spaced apart relationlengthwise of said sleeve for movement toward and away from a positionwherein said blades are engageable with said abrasiveheaded stems. 2. Anattachment as described in claim 1 wherein interlocking means on saidsleeve and shaft operate to releasably retain said abrasive headed stemsin inoperative position relative to said blades.

3. An attachment as described in claim 1 wherein said sleeve is providedwith a longitudinally extending radially projecting web provided withholes in spaced apart relation lengthwise of said web in which saidstems are adjustably fastened.

4. An attachment for machines having a series of band blades travellincontinuously about spaced parallel rotors comprising in combination astationary mount supported in spaced parallel relation to the axes ofsaid rotors, a holder mounted thereon for swinging motion about themount as an axis and for shifting motion longitudinally of said axis,and abrasive headed stems fastened to said holder in aligned spacedapart relation lengthwise of said holder for movement toward and awayfrom a position wherein said blades are engageable with said abrasiveheaded stems.

PAUL CRISSEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number

